We need to write a 1500+ character article (words? they said 1500字, meaning Chinese characters, not words). Must be 1500 characters minimum, but they say must write 1500字, cannot be less than 1050字. So we need at least 1500 Chinese characters. Structure: 6-8 paragraphs, each 150-250 characters. So total characters roughly 6150=900 up to 8250=2000. Need at least 1500 characters, so we need about 6-8 paragraphs each around 200-250 characters to reach 1500. Let's aim for 7 paragraphs, each about 220 characters => 1540 characters. Must not include title, just body. Must not use AI detection triggers: avoid set phrases. Must be natural, conversational, like chatting with friends. Use short sentences, active voice, avoid passive. No intro filler, directly cut in. Must reference title: "江河湖海皆入图，一纸勘尽水脉源流。" Title is given, but we must not output the title, just start directly with content that echoes title. So first paragraph should refer to title perhaps: "江河湖海皆入图，一纸勘尽水脉源流。" but we cannot output the title? They said "标题已确定为..." and "文章内容必须紧扣这个标题来写。" But they also said "直接输出正文，不要标题". So we should not output the title. But we need to echo it, maybe paraphrase or refer to it. So start with something like "这幅图把江河湖海都装进了纸上，一笔勘出水的脉络。" That echoes. That is okay.

Paragraph length 150-250 Chinese characters. Let's count approximate characters. We'll need to produce about 7 paragraphs of ~220 characters each. Must be careful not to use banned transition words like "、". Also avoid "". Use natural flow.

We'll write paragraphs each separated by blank line.

Paragraph1: ~220 chars. Talk about how a map of water systems looks, the idea of tracing sources, the feeling of seeing rivers on paper.

Paragraph2: talk about ancient cartographers, how they mapped rivers, the process of field surveys, using ink.

Paragraph3: talk about modern GIS, digital mapping, but still similar concept.

Paragraph4: talk about the symbolism of water, how it connects places, the metaphor of water as lifeblood.

Paragraph5: talk about personal experience, maybe a trip along a river, noticing how tributaries join.

Paragraph6: talk about environmental concerns, mapping water usage, the responsibility.

Paragraph7: conclusion echoing title, reflecting on the map as a living document.

Need to keep each paragraph 150-250 characters. Let's approximate.

I'll write each paragraph and then count characters roughly.

Paragraph1: "这张纸上，山川、河流、湖泊都被画得清清楚楚，像是把整个世界的水脉揭开了。你看到的每一条曲线，都是自然的痕迹，是雨水在山坡上流下、汇成江河的路径。我们常说江河湖海皆入图，一纸勘尽水脉源流，这图正是把那些看不见的流动变成可触摸的线条。"

Count characters: Let's count roughly. Chinese characters count each. I'll count: 这(1)张2纸3上4，5山6川7、8河9流10、11湖12泊13都14被15画16得17清18清19楚20，21像22是23把24整25个26世27界28的29水30脉31揭32开33了34。35你看36到37的38每39一40条41曲42线43，44都45是46自47然48的49痕50迹51，52是53雨54水55在56山57坡58上59流60下61、62汇63成64江65河66的67路68径69。70我们71常72说73江74河75湖76海77皆78入79图80，81一82纸83勘84尽85水86脉87源88流89，90这91图92就93是94把95那96些97看98不99见100的101流动102变103成104可105触106摸107的108线109条110。 That's about 110 characters. Need 150-250, so add more.

Add more: "每条线背后，都藏着山泉的最初声响，和雨滴在石缝里敲出的节奏。纸上的墨迹，像是把时间的流逝凝固成了一条条可读的河流脉络。" Let's add that.

Add: "每条线背后，都藏着山泉的最初声响，和雨滴在石缝里敲出的节奏。纸上的墨迹，像是把时间的流逝凝固成了一条条可读的河流脉络。" Count characters: 每1条2线3背4后5，6都7藏8着9山10泉11的12最13初14声15响16，17和18雨19滴20在21石22缝23里24敲25出26的27节28奏29。30纸31上32的33墨34迹35，36像37是38把39时40间41的42流43逝44凝45固46成47的48一49条50条51可52读53的54河55流56脉57络58。 That's about 58 characters. So total paragraph now ~110+58=168 characters. Good within 150-250.

Paragraph2: talk about how ancient cartographers mapped rivers, fieldwork, ink.

Paragraph2 draft: "古代的制图师们，背着简帛进山林，踩着溪流走到最深处。他们不只是画个线，而是记录每一次跌落的高度、每一段急转的角度。一边测量，一边用炭笔在布上勾勒，哪怕是一条细小的支流，也要标上名字。这份细致，源自对水的敬畏，也让每条河在纸上有了自己的呼吸。"

Count characters: 古1代2的3制4图5师6们7，8背9着10简11帛12进13山14林15，16踩17着18溪19流20走21到22最23深24处25。26他27们28不29是30画31个32线33，34而35是36记37录38每39一40次41跌42落43的44高45度、46每47一48段49急50转51的52角53度54。55哪56怕57是58一59条60细61小62的63支64流65，66也67要68标69上70名71字72。73这74份75细76致77，78源79自80对81水82的83敬84畏85，86也87让88每89条90河91在92纸93上94有95了96自97的98呼99吸100。 That's about 100 characters. Need 150-250. Add more: "有时他们会在河岸搭起简易的木桥，借助竹竿量深，甚至把石头敲成刻度，让水的流速变成数字。每一次的测绘，都是一次与自然的对话，纸上的每一笔，都在述说着水的故事。" Count characters: 有时1他们2会3在4河5岸6搭7起8简9易10的11木12桥9？ Need recount properly. Let's just approximate added ~70 characters. So total ~170. Good.

Paragraph3: talk about modern GIS, digital mapping, but still same concept.

Paragraph3 draft: "如今，卫星在太空里捕捉地球的形状，数据瞬间铺在屏幕前。程序员们用代码把每条支流、每座水库都标上坐标，甚至可以实时监测水位的起伏。可无论多高科技，最终的图表还是得落回纸面，才能让人们感受到那份温度。一张纸，依旧能把江河湖海皆入图，一纸勘尽水脉源流的古老情怀，带回现代的客厅。"

Count characters: 今1今2，3卫4星5在6太7空8里9捕10捉11地12球13的14形15状16，17数18据19瞬20间21铺22在23屏24幕25前26。27程28序29员30们31用32代33码34把35每36条37支38流39、40每41座42水43库44都45标46上47坐48标49，50甚51至52可